CMYK Conversion for Print Preparation

[Eddie Hyde]

Hi

I'm trying to use Affinity Publisher to prepare a pdf document to send to a printing company that recommend a specific CMYK profile (Coated GRACol 2006 ......). They recommend doing the conversion in photoshop because it is supposedly possible to tweak the CMYK file to compensate for any image flattening. However, Affinity converts to this profile too. So I'm guessing it overrides the original conversion / does it again? If the image file is linked to the source can it still be adjusted in Photoshop if it doesn't look quite right and does any of this matter? Can anyone suggest a good and easy workflow from RGB image file to printable image in an Affinity document?

[thomaso]

The safest way seems to be…
a.) to set the .afpub's document color profile to the desired and
b.) to export as PDF/X to force an unambiguous output intent
c.) with the desired profile (= "Document profile" if a. is set) and
d.) "Convert image color spaces" checked.

The originals of linked resources aren't altered by APub. Once you altered a linked resource you need to update its linked item in APub to make the change become true in this .afpub.